07-08-2019 03:09 PM
I'm experiencing an issue with all of our T470s' docked on a 40A20170US. After updating to Windows 10 1903, the external monitors won't turn back on unless laptop is physically un-docked/re-docked.
What I have tried:
Installed all updates via Lenovo Vantage (including firmware and bios)
All Windows updates
Made sure docking stations have latest firmware
Tried sleep and or hybernation as well as default power settings
Leaving laptop open
Working with CDW support who said I tried everything they would try
T470s ---> 40A20170US -----> (via 2x display ports on dock) -----> (2x VGA ports) on HP VH240a
***When remoting in with logmein, I can remotely see all displays
Thank-you for your assistance in this matter
Solved! Go to Solution.
07-08-2019 04:20 PM
This has been reported by others in this forum thread but it provides no solution. My guess is that a new display driver may be needed.
I am curious, does the pressing the left SHIFT + CTRL +WinKey + B (resets graphics adapter) cause the external screens to wake up?
07-10-2019 12:57 PM
Hitting Shift + Ctrl + Winkey + B turned both monitors to duplicate the display without the Windows login (Second screen is usually black on login but you can see the cursor on it)
07-10-2019 01:56 PM - edited 07-11-2019 01:10 PM
So it did light up the screens, but there was just no way to login (even even using CTRL+ALT+DEL etc)
What graphics driver are you systems running, the 184.108.40.20672 one from Lenovo, or the 220.127.116.1112 one from Intel? If you are using the older Lenovo version that was released prior to 1903, then you may want to try the later Intel driver on one of the system to see if that helps.
The Driver from Intel is a bit of a pain to install, because you first have to switch to the default Windows 10 graphics driver, or the installer will exit out and point to you back to your OEM.
If you want to try the latest Intel driver, here are the steps to install them.
Before starting, download the latest Intel DCH driver for your graphics adapter, and disconnect your dock or any other external monitors for the time being.
Downloads for Intel® HD Graphics 520
Downloads for Intel® HD Graphics 620
Switch to Microsoft Basic Display Adapter
Right-click on Start and select Device Manager
Expand the "Display Adapters" section, and then double-click on your Intel HD Graphics adapter
Select the Driver tab -> "Update Driver" -> "Browse my computer for driver software" -> "Let me pick from a list of available drivers on my computer"
Select “Microsoft Basic Display Adapter”
Click “Next” (note that your screen resolution will probably change) when it switches to the basic driver)
Close Device Manager
You should now be able to launch and install the latest Intel DCH driver installation successfully.
Best of luck,
07-10-2019 02:27 PM
Correct, it gave me a duplication of the off screen when loggin in with multiple monitors. I can see the cursor but not the screen that would be used to login.
HD Graphics 520
I'll update and report back tomorrow morning with results. Thank-you for your assistance in this matter!
07-11-2019 11:17 AM - edited 07-11-2019 01:32 PM
Single tap to the docking station turned all monitors on and in correct position! I'll keep updating each morning but feel like that graphics driver update did the trick
07-17-2019 09:23 AM - edited 07-17-2019 09:24 AM
After using it for a week, it looks like this fix has worked most of the time. When it doesn't, I can hit the power button on my laptop, and then the power button on the docking station. Doing so will wake both monitors up
The common denominator on when I must do the above: Choosing to "lock" vs "sign off" end of day.